math/test-fenv-clear-main.c

   1 /* Test fesetenv (FE_DFL_ENV) and fesetenv (FE_NOMASK_ENV) clear
   2    exceptions (bug 19181).
   3    Copyright (C) 2015-2017 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <fenv.h>
  21 #include <float.h>
  22 #include <stdio.h>
  23
  24 volatile float fa = 1.0f, fb = 0.0f, fc = FLT_MAX, fr;
  25 volatile long double lda = 1.0L, ldb = 0.0L, ldc = LDBL_MAX, ldr;
  26
  27 static void
  28 raise_exceptions (void)
  29 {
  30   /* Raise exceptions both with feraiseexcept and arithmetic to allow
  31      for case of multiple floating-point units with separate
  32      exceptions state.  */
  33   feraiseexcept (FE_ALL_EXCEPT);
  34   fr = fb / fb;
  35   fr = fa / fb;
  36   fr = fc * fc;
  37   fr = fa / fc / fc;
  38   ldr = ldb / ldb;
  39   ldr = lda / ldb;
  40   ldr = ldc * ldc;
  41   ldr = lda / ldc / ldc;
  42 }
  43
  44 static __attribute__ ((noinline)) int
  45 run_tests (void)
  46 {
  47   int result = 0;
  48   raise_exceptions ();
  49   if (fesetenv (FE_DFL_ENV) == 0)
  50     {
  51       puts ("PASS: fesetenv (FE_DFL_ENV)");
  52       if (fetestexcept (FE_ALL_EXCEPT) == 0)
  53         puts ("PASS: fesetenv (FE_DFL_ENV) clearing exceptions");
  54       else
  55         {
  56           puts ("FAIL: fesetenv (FE_DFL_ENV) clearing exceptions");
  57           result = 1;
  58         }
  59     }
  60   else
  61     {
  62       puts ("FAIL: fesetenv (FE_DFL_ENV)");
  63       result = 1;
  64     }
  65 #ifdef FE_NOMASK_ENV
  66   raise_exceptions ();
  67   if (fesetenv (FE_NOMASK_ENV) == 0)
  68     {
  69       if (fetestexcept (FE_ALL_EXCEPT) == 0)
  70         puts ("PASS: fesetenv (FE_NOMASK_ENV) clearing exceptions");
  71       else
  72         {
  73           puts ("FAIL: fesetenv (FE_NOMASK_ENV) clearing exceptions");
  74           result = 1;
  75         }
  76     }
  77   else
  78     puts ("fesetenv (FE_NOMASK_ENV) failed, cannot test");
  79 #endif
  80   return result;
  81 }
  82
  83 static int
  84 do_test (void)
  85 {
  86   CHECK_CAN_TEST;
  87   return run_tests ();
  88 }
  89
  90 #define TEST_FUNCTION do_test ()
  91 #include "../test-skeleton.c"